A model of the sources and consequences of mismatches between gestures and speech is presented that argues that the transitional knowledge state is the source of the mismatch and that such mismatches signal that a child is in a transitional state of concept acquisition and is ready to learn. (SLD)

A discussion of the role of affective factors in reading within the framework of the substrata factor theory is presented. The substrata factor theory and theories of the intellect are briefly discussed, and the absence of affective factors in these theories is pointed out. These affective factors are seen as influential in the individual's…

A paradigm for learning economic concepts based on cognitive development and learning theory is offered as a guideline for teaching and research. Discussion is divided into two sections. The first section establishes the model's theoretical framework, which is based on two propositions. The first of these is that economic knowledge is not a fixed…